65amp wiring/trouble shooting

SlantedMark4 said

First of all, yes, there's a tag on the alternator. I'm assuming I can take it off to read it properly? It seems to be bolted on with a screw but I don't want to unscrew something important (I've never worked on an alternator).

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Best leave that screw alone. It is one of three screws holding the alternator together.

When you change the v-belt, as you rotate the alternator, maybe the front of the tag will be readable.
I don't know the meaning of the numbers on the back.
It looks black.
Page 8-138 in the 1974 service manual says natural is '60 amp' and black is '65 amp'